Block copolymer release surface for pressure sensitive adhesives
AssigneeAvery Dennison Corporation
InventorsRoger H. Mann, Edward I. Sun, Sebastian S. Plamthottam, Charles W. Newing
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Abstract
Release surfaces comprising extruded polymer-siloxane block copolymer mixtures are provided. At least one block of the copolymer is a polymer compatible with the bulk polymeric material, while a second block is polysiloxane. Coextruded release surfaces comprising two or more polymeric layers, including one layer of a polymer-siloxane block copolymer mixture, are provided. The release surfaces serve as release liners for pressure sensitive adhesive labels and tapes.
Claims39
A release surface for a pressure sensitive adhesive construction, comprising:
- a pressure-sensitive adhesive-releasable polymeric film comprising an extruded mixture of a first polymeric material and a block copolymer, wherein a first block of the copolymer is compatible with said first polymeric material, and a second block of the copolymer is a polysiloxane.
A release surface for a pressure sensitive adhesive, comprising:
- a pressure-sensitive adhesive-releasable polymeric film comprising an extruded mixture of (a) from about 90 to 99.9% by weight polyolefin, and (b) from about 0.1 to about 10% by weight block copolymer, wherein a first block of the copolymer is compatible with the polyolefin, and a second block of the copolymer is polydimethylsiloxane.
A coextruded release surface for a pressure sensitive adhesive construction, comprising:
- a first extruded layer of a mixture of a first polymeric material and a block copolymer, wherein a first block of the copolymer is compatible with the first polymeric material, and a second block of the copolymer is a polysiloxane;
- and
- at least one additional extruded layer of polymeric material.
A release surface for a pressure sensitive adhesive construction, comprising:
- an extruded mixture of a first polymeric material and a tri-block copolymer having the formula ABA, where A is a polymeric block compatible with the first polymeric material, and B is a polysiloxane.
A method for making a release surface for a pressure sensitive adhesive, comprising:
- extruding a mixture of a first polymeric material and a block copolymer, wherein a first block of the copolymer is compatible with said first polymeric material, and a second block of the copolymer is a polysiloxane.
A method for making a release surface for a pressure sensitive adhesive, comprising:
- coextruding (a) a first layer of a mixture of a first polymeric material and a block copolymer, wherein a first block of the copolymer is compatible with said first polymeric material, and a second block of the copolymer is a polysiloxane, and (b) at least one additional layer of polymeric material.
Dependencies are inferred from the claim text.